Cervantes ex Bonpland

in A. von Humboldt and A. J. Bonpland, Pl. Aequinoct. 1: 143, plate 41. 1807.

Etymology: For “M. le marquis de Guardiola”
Treatment appears in FNA Volume 21. Treatment on page 42. Mentioned on page 41.

Perennials or subshrubs, (10–)30–100 cm. Stems mostly erect, branched. Leaves cauline; opposite; ± petiolate; blades deltate or rounded-deltate to ovate [lanceolate to linear], margins usually dentate, faces glabrous or glabrate. Heads radiate, in corymbiform arrays [borne singly]. Involucres narrowly cylindric [campanulate], 2–3[–6] mm diam. Phyllaries persistent, 3–5 in 1 series (distinct, oblong or lanceolate to linear, herbaceous, conduplicate, streaked with 8–12+ translucent nerves, margins often membranous). Receptacles convex, paleate (paleae similar to phyllaries, membranous, each enfolding a floret). Ray florets 1–5, pistillate, fertile; corollas whitish (tubes often longer than laminae). Disc florets 3–20+, functionally staminate; corollas whitish, tubes longer than abruptly ampliate, campanulate to funnelform throats, lobes 5, lanceolate to lance-linear (filaments hairy; anthers green). Cypselae ± ellipsoid [fusiform to clavate], ± obcompressed, smooth or fine-ribbed, glabrous (bases carunculate); pappi 0 [5–6, erose scales]. x = 12.


sw United States, Mexico.


Species ca. 10 (1 in the flora).

Selected References